West Civ Project Knaide: Biographies of Socrates, Plato, and Aristotle

Socrates was an Ancient Greek philosopher who brought about a new logic and method of arguing. He believed himself wiser than other thinkers because he could recognize his own ignorance, while they could not. His thinking process had to do a lot with logic and reasoning. Many people in Athens grew to hate him, and he was eventually charged with corrupting the youth and put to death.

http://www.notablebiographies.com/Sc-St/Socrates.html

Plato was one of Socrates' students and was taught to think critically about things. He believed that it was important to know yourself completely and examine every aspect of life. He focused greatly on virtues and values. He even founded a school, The Academy, where he gave lectures. He eventually ended up dying from old age when he was about eighty.

http://library.thinkquest.org/18775/plato/biop.htm

Aristotle was one of Plato's students at The Academy, and eventually became a teacher there. When Plato died, he left Athens and ended up starting his own school. The philosophies that Aristotle developed went against his former teacher's. He believed that philosophy had to be based on known facts.